code: def render_pep440_post_branch(pieces):
      """TAG[.postDISTANCE[.dev0]+gHEX[.dirty]] .
  
      The ".dev0" means not master branch.
  
      Exceptions:
      1: no tags. 0.postDISTANCE[.dev0]+gHEX[.dirty]
      """
      if pieces["closest-tag"]:
          rendered = pieces["closest-tag"]
          if pieces["distance"] or pieces["dirty"]:
              rendered += f".post{pieces['distance']}"
              if pieces["branch"] != "master":
                  rendered += ".dev0"
              rendered += plus_or_dot(pieces)
              rendered += f"g{pieces['short']}"
              if pieces["dirty"]:
                  rendered += ".dirty"
      else:
          # exception #1
          rendered = f"0.post{pieces['distance']}"
          if pieces["branch"] != "master":
              rendered += ".dev0"
          rendered += f"+g{pieces['short']}"
          if pieces["dirty"]:
              rendered += ".dirty"
      return rendered
  
imports: import errno
  import functools
  import os
  import re
  import subprocess
  import sys
  from typing import Callable
label_desc: Use image node_id 15 for calling a global function with example usage: render_pep440_post_branch(pieces) and returns: rendered